21696369465 has 8 divisors (see below), whose sum is σ = 34714191168. Its totient is φ = 11571397040.

The previous prime is 21696369437. The next prime is 21696369467. The reversal of 21696369465 is 56496369612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21696369465 - 2¹³ = 21696361273 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21696369467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723212301 + ... + 723212330.

It is an arithmetic number, because the mean of its divisors is an integer number (4339273896).

Almost surely, 2^21696369465 is an apocalyptic number.

It is an amenable number.

21696369465 is a deficient number, since it is larger than the sum of its proper divisors (13017821703).

21696369465 is a wasteful number, since it uses less digits than its factorization.

21696369465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446424639.

The product of its digits is 12597120, while the sum is 57.

The spelling of 21696369465 in words is "twenty-one billion, six hundred ninety-six million, three hundred sixty-nine thousand, four hundred sixty-five".